diff --git a/package-lock.json b/package-lock.json
index 0e92568..d25dc32 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13916,9 +13916,9 @@
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
     },
     "typescript": {
-      "version": "3.3.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.3.3.tgz",
-      "integrity": "sha512-Y21Xqe54TBVp+VDSNbuDYdGw0BpoR/Q6wo/+35M8PAU0vipahnyduJWirxxdxjsAkS7hue53x2zp8gz7F05u0A==",
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.2.3.tgz",
+      "integrity": "sha512-qOcYwxaByStAWrBf4x0fibwZvMRG+r4cQoTjbPtUlrWjBHbmCAww1i448U0GJ+3cNNEtebDteo/cHOR3xJ4wEw==",
       "dev": true
     },
     "uglify-js": {
diff --git a/package.json b/package.json
index e7680b5..d1f9c29 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   },
   "devDependencies": {
     "gh-pages": "^2.2.0",
-    "typescript": "3.3.3"
+    "typescript": "4.2.3"
   },
   "scripts": {
     "predeploy": "npm run build",